MonkeyMe: I don't think it would hurt to send a letter anyway. Canada or not, you still watch the show.
Anyway, if we wanted to go with the fake bananas, I found a couple of sites where you can order plastic fruit.
http://www.barnardltd.com/$spindb.query.listallalpha.tdview.73.B
http://www.amazingproduce.com/ListSelect.cfm?recordID=Banana
The first one seems a little better, though slightly more expensive. But you can order any quantity you want there, while the other site requires you to buy in bulk. Just a thought.
Also, I think whatever we decide to do, we should alert Kristin Veitch at E! News online. She's a big fan of the show and can get the campaign some publicity. She did the same thing for the fans of the UPN show Veronica Mars, who incidentally, are collecting and sending Monopoly money.
Meanwhile, send those e-mails, write those snail mail letters, and call the comment lines! We will not go quietly into the night!